SENSING FEATURE ON FUSE ELEMENT FOR DETECTION PRIOR TO FUSE OPEN

• US 20170179548A1
• Filed: 12/16/2015
• Published: 06/22/2017
• Est. Priority Date: 12/16/2015
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Lee, John J., Cantrell, Leonard B., Fan, Yue
• Granted Patent: US 10,164,300 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: H01H 2085/025 Structural association with a binding post of a storage battery
• CPC Class Codes: H01H 2231/026 Car
• CPC Class Codes: H01H 69/02 Manufacture of fuses
• CPC Class Codes: H01H 85/06 characterised by the fusible material H01H85/11 takes precedence
• CPC Class Codes: H01H 85/10 with constriction for localised fusing H01H85/11 takes precedence
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2010/4278 Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
• CPC Class Codes: H01M 2200/103 Fuse
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/202 Casings or frames around the primary casing of a single cell or a single battery
• CPC Class Codes: H01M 50/204 Racks, modules or packs for multiple batteries or multiple cells
• CPC Class Codes: H01M 50/249 specially adapted for aircraft or vehicles, e.g. cars or trains constructional details of batteries specially adapted for electric vehicles B60L50/64
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries

Abstract

A sensing circuit, a vehicular battery pack using a sensing circuit, a method of protecting a circuit with a fuse and a method of providing battery power to a vehicle. The sensing circuit includes the fuse, which is made up of a main element and a sensing element such that the sensing element defines a pre-open detection capability through at least one of a dissimilar geometric profile or a different material choice from that of the main element. The sensing circuit also includes an electrical connector between one or more battery cells and an electronic control module so that the circuit provides indicia of the fusing event. In this way, a fuse opening event takes place in the sensing element prior to the main element in such a way as to give the operator of a battery-powered vehicle advance warning of an impending opening of the main element and consequent electrical circuit shutdown, thereby allowing the operator of the vehicle to take corrective measures as a way to avoid fuse opening and a related loss of vehicular propulsive power.

Claims

1. A sensing circuit signally cooperative with at least one battery cell within a battery pack, said circuit comprising:

at least one fuse comprising a main element and a sensing element the latter of which defines a pre-open detection capability through at least one of (a) a material that is dissimilar from a material that defines said main element and (b) a dissimilar geometric profile from that of said main element such that a fusing event takes place in said sensing element prior to said main element;

an electrical conductor connected to said fuse such that upon receipt of an electrical signal from said at least one battery cell or an electronic module cooperative therewith, said sensing circuit provides indicia of said fusing event through opening of said sensing element prior in time to opening said main element.

2. The circuit of claim 1, wherein said dissimilar geometric profile defines a region of increased strain within said sensing element relative to that of said main element.

3. The circuit of claim 2, wherein said region of increased strain is defined by a geometric profile that distributes thermal expansion strain less evenly.

4. The circuit of claim 1, wherein said sensing element comprises a dissimilar geometric profile from said main element and a material similar to said main element.

5. The circuit of claim 1, wherein said material of at least one of said main element and said sensing element is selected from the group consisting of copper and its alloys.

6. The circuit of claim 5, wherein at least one of alloys further comprises at least one of zinc, tin, lead and silver.

7. The circuit of claim 1, wherein said sensing element is secured to said main element through a joining material.

8. The circuit of claim 7, wherein said joining material is selected from the group consisting of epoxy-based adhesives, polyurethane-based adhesives, and similar bonding materials possessing electrical insulating properties, thermally-conducting properties, and thermal-mechanical properties similar to those of main element and sensing element properties.

9. A battery pack configured to provide propulsive power to a vehicle, said battery pack comprising:

a plurality of battery cells aligned along a stacking axis to define a facing relationship thereby;

a housing configured to contain said plurality of cells therein;

at least one electronic control unit cooperative with at least one of said battery cells; and

a plurality of sensing circuits signally cooperative with at least one of said battery cells, said circuit comprising;

at least one fuse comprising a main element and a sensing element the latter of which defines a pre-open detection capability through at least one of (a) a material that is dissimilar from a material that defines said main element and (b) a dissimilar geometric profile from that of said main element such that a fusing event takes place in said sensing element prior to said main element;

an electrical conductor connected to said fuse such that upon receipt of an electrical signal from said at least one battery cell or said electronic control unit, said sensing circuit provides indicia of said fusing event through opening of said sensing element prior in time to opening of said main element.

10. The pack of claim 9, wherein said dissimilar geometric profile defines a region of increased strain amplitude relative to that of said main element.

11. The pack of claim 9, wherein said material of at least one of said main element and said sensing element is selected from the group consisting of copper and it alloys.

12. The pack of claim 9, wherein at least one of alloys further comprises at least one of zinc, tin, lead and silver.

13. A method of making a fuse, said method comprising:

providing a main element of said fuse;

providing a sensing element of said fuse; and

connecting said sensing element to said main element, said sensing element cooperative with said main element such that a fusing event takes place in said sensing element prior to said main element through at least one of (a) a material that is dissimilar from a material that defines said main element and (b) a dissimilar geometric profile from that of said main element.

14. The method of claim 13, wherein said material of at least one of said main element and said sensing element is selected from the group consisting of copper and its alloys.

15. The method of claim 14, wherein said alloy comprises at least one of zinc, tin, lead and silver.

16. The method of claim 13, wherein said main element and said sensing element are joined to one another through a joining material.

17. The method of claim 13, wherein said main element and said sensing element are joined to one another through a welded joint or a fastener.

18. The method of claim 13, wherein said providing said main element and said sensing element comprises fabricating both from at least one of common tooling or common material.

19. The method of claim 18, wherein said common tooling operates under at least one of said tooling wear conditions and operating parameters in order to produce substantially similar properties in both said main element and said sensing element.

20. The method of claim 18, wherein said common material for both said main element and said sensing element is provided from a common raw material batch.

21. A method of providing battery power to a vehicle, said method comprising:

using a battery pack to provide at least a portion of propulsive power for said vehicle, wherein said battery pack is cooperative with an electronic control unit to provide indicia of a fuse opening event to personnel within said vehicle; and

including a sensing circuit signally cooperative with at least one battery cell within said battery pack, said circuit comprising;

at least one fuse comprising a main element and a sensing element the latter of which defines a pre-open detection capability through at least one of (a) a material that is dissimilar from a material that defines said main element and (b) a dissimilar geometric profile from that of said main element such that a fusing event takes place in said sensing element prior to said main element; and

an electrical conductor connected to said fuse such that upon receipt of an electrical signal from said at least one battery cell or an electronic module cooperative therewith, said sensing circuit provides indicia of said fusing event through opening of said sensing element prior in time to opening of said main element.

22. The method of claim 21, wherein said electronic control unit is configured such that upon continued operation of said vehicle after said indicia was provided to an operator thereof, said electronic control unit operates to impart a power reduction to said battery pack until such time as said vehicle is taken in for service to said sensing circuit.